・ The development of astronomy, astrophysics, high-energy physics, mankind has been able to observe the world that spans up 45 digit (from 19th power of 10 to 26th power of 10 meters).
・ In addition, the phenomenon and force in the microscopic world is can be explained by the quantum theory, and macroscopic gravity phenomenon is can be explained by the general theory of relativity.
・ Since 1980, scientists around the world are working on the development of the superstring theory that unifies general theory of relativity and the quantum theory, and that theory can be explained from the microscopic to the macroscopic world.
・ Quantum theory has poor compatibility with gravity, would have obtained a result of the contradiction to be fitting the quantum theory to gravity. Superstring theory is expected as candidates for the theory that can be understood gravity in the framework of the quantum theory.
・ The goal of the superstring theory is that it leads to observable predictions.
・ However, from the size of a "string" which this theory assumes being very small etc., superstring theory has not acquired the status as an established theory of physics.
１．「宇宙の数学とは何か」Hirosi Ooguri（Fred Kavli Professor of Theoretical Physics and Mathematics. California Institute of Technology）
２．「アインシュタインの夢と超弦理論」 基礎物理学研究所 江口徹教授
○ According to the superstring theory, spatial dimension of 4-10 has been folded into very fine "Planck distance" (35 square minus 10 m) of magnitude.
○ In superstring theory, we do not know how to represent the membrane yet.
【Reference】Michio Kaku / New York incandescent classroom "Dream of Einstein " 20150403
・Superstring theory suggests that the Big Bang there was many times. In other words, the universe is not one. It will be that the universe is multi and there are parallel universes.
• In the parallel universe, the laws of physics are different, but superstring theory's seems applicable.
【Reference】Michio Kaku / New York incandescent classroom " Amazing prophecy of "Theory of Everything;TOE"" 20150403
【Reference】LISA Project Office